align.c

/* * Copyright (c) 2003, 2006 Matteo Frigo * Copyright (c) 2003, 2006 Massachusetts Institute of Technology * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * *//* $Id: align.c,v 1.29 2006-01-15 20:12:08 athena Exp $ */#include "ifftw.h"#if HAVE_SIMD# define ALGN 16#elif HAVE_K7# define ALGN 8#else/* disable the alignment machinery, because it will break, e.g., if sizeof(R) == 12 (as in long-double/x86) */# define ALGN 0#endif/* NONPORTABLE */int X(alignment_of)(R *p)
{
if (ALGN > 0)
return (int)(((uintptr_t) p) % ALGN);
elsereturn 0;
}